x402-gated employee salary lookup endpoint on Base, paid per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to employee salary data (specifically employee ID 146) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals = $0.02). No API keys or rate limits are required; access is granted by attaching an X-PAYMENT header with a valid x402 payment proof.
The hosting site lowpaymentfee.com offers a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request. This particular endpoint (/api/v1/employees/146/salary) is not listed on the site's main catalog page, which raises questions about whether it is a demo, test, or internal endpoint. The endpoint is live and returns a proper 402 challenge, confirming it is operational.
Documentation is extremely sparse. The site's /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the salary response contains or what input parameters (if any) the POST body expects. Use with caution given the lack of documentation.
Capabilities
Use cases
- —Retrieving salary information for employee ID 146 via a pay-per-request model
- —Demonstrating x402 payment protocol integration with a simple data endpoint
- —Automated payroll data retrieval by AI agents with crypto-native payment
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing on-demand salary data without API key management
- —Quick one-off data lookups paid in USDC on Base
Not for
- —Bulk employee data retrieval across many employee IDs (only one ID exposed)
- —Production HR/payroll systems requiring authenticated, documented APIs
- —Users without USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/employees/146/salary \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but documentation is essentially nonexistent—no OpenAPI spec, no request/response examples, and no description of the data model. The endpoint is not listed in the site's own catalog, raising questions about its intended use. Score reflects a functional but poorly documented stub.
Warnings
- —No documentation available: /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
- —This specific endpoint (/api/v1/employees/146/salary) is not listed on the provider's main catalog page, suggesting it may be a test or internal endpoint.
- —No request body schema or response schema is documented; callers must guess at the expected input and output format.
- —The endpoint appears to expose salary data for a single hardcoded employee ID (146); generalizability is unknown.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/employees/146/salary
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/employees/146/salary
- —Site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The /docs, /pricing, /api, and /README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs